From: Alan Pearce <kiwiantipodean@googlemail.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Thu, 17 Dec 2020 10:47:53 -0800
Subject: Re: [OT] Solar p;anels
Thread-Topic: [OT] Solar p;anels
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That link worked for me. I haven't gone looking to see if the data is
available online, the table for Annette, Alaska looks like it would
suit a UK installation.

On Thu, 17 Dec 2020 at 15:34, Byron Jeff <byronjeff@clayton.edu> wrote:
>
> Try: https://www.nrel.gov/docs/legosti/old/5607.pdf
>
> That URL came up fine for me.
>
> BAJ
>
> On Thu, Dec 17, 2020 at 01:55:36PM +0000, David C Brown wrote:
> > Thanks.  My confusion is mainly due to the fact,that, having worked
> > with radio telescopes for forty years, I think od pointing at the horiz=
on
> > as being elevation zero
> > and pointing at the zenith as being elevation 90.  Having got that out =
of
> > my head I can understand things a little better..
> > That link is broken for me
> > __________________________________________
> > David C Brown
> > 43 Bings Road
> > Whaley Bridge
> > High Peak                           Phone: 01663 733236
> > Derbyshire                eMail: dcb.home@gmail.com
> > SK23 7ND          web: www.bings-knowle.co.uk/dcb
> > <http://www.jb.man.ac.uk/~dcb>
> >
> >
> >
> > *Sent from my etch-a-sketch*
> >
> >
> > On Thu, 17 Dec 2020 at 12:26, Forrest Christian (List Account) <
> > lists@packetflux.com> wrote:
> >
> > > Sorry, missed, this reply two days ago..
> > >
> > > The sun is lower on the horizon during the winter, so you want it poi=
nted
> > > more at the horizon.
> > >
> > > But first a bit of orientation:  The further north you go the higher =
the
> > > latitude.   So 90* is at the horizon, i.e. vertical, and 0 degrees wo=
uld be
> > > at the sky.
> > >
> > > So at 45 north yes, you'd want it at 45+15 or 60 degrees.
> > >
> > > AT 50 north,  you'd want it at 45+15 or 65 degrees.
> > >
> > > An old resource, but still pretty valid is at
> > > nrel.gov/docs/legosti/old/5607.pdf , it's data for different sites, a=
nd
> > > will give you a multiplication factor which will tell you the average=
 watts
> > > you will get out of a panel mounted at a given angle in each month.  =
 If
> > > the figure is like 3.0 for a month, you can take your panel wattage (=
say
> > > 300) and multiply it by this figure (3), and get the number of watt h=
ours a
> > > day you'll get (900).  Note that there are average/min/max figures an=
d this
> > > data is from a range of years a while back.
> > >
> > >
> > >
> > > On Tue, Dec 15, 2020 at 8:58 AM Gordon Williams <gwilliams@ncf.ca> wr=
ote:
> > >
> > > > Hmm - I think the labels may be wrong on the graph.
> > > >
> > > > Why would it not be latitude PLUS 23.5 deg rather than minus 15 deg=
 as
> > > > you suggest for max power in winter?
> > > >
> > > > You want them MORE angled up to get the sun as it is closer to the
> > > > horizon in winter, not more parallel to the ground.
> > > >
> > > > Wouldn't the panel perform best when it is perpendicular to the sun=
s
> > > > rays at the winter solstice?
> > > >
> > > > Gord Williams
> > > >
> > > >
> > > > On 2020-12-15 9:31 a.m., Forrest Christian (List Account) wrote:
> > > > > Note that this means latitude*minus* 15, or pointing at where the=
 sun
> > > is
> > > > on
> > > > > solar noon in about a week from now.   If you engineer for that, =
then
> > > the
> > > > > rest of the year you're golden.
> > > > --
> > > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> > > > View/change your membership options at
> > > > http://mailman.mit.edu/mailman/listinfo/piclist
> > > >
> > >
> > >
> > > --
> > > - Forrest
> > > --
> > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> > > View/change your membership options at
> > > http://mailman.mit.edu/mailman/listinfo/piclist
> > >
> > --
> > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
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> > http://mailman.mit.edu/mailman/listinfo/piclist
>
> --
> Byron A. Jeff
> Associate Professor: Department of Computer Science and Information Techn=
ology
> College of Information and Mathematical Sciences
> Clayton State University
> http://faculty.clayton.edu/bjeff
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
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